feat: wire up album filtering to photo queue

Album selection now controls which photos are displayed.
Uses POST /api/search/random with albumIds filter (Immich v3
compatible) instead of the removed GET /api/albums/{id} assets.

- Add albumIds parameter to fetchRandomAssets/fetchRandomAssetIds
- syncFromAlbums: fetch random assets filtered by selected albums
- syncFromAllPhotos: preserve existing global random behavior
- Album mode reshuffles on exhaustion instead of re-fetching
- 24h resync checks album assetCounts for changes before re-fetch
- requestSync + albums_changed action triggers queue rebuild on save
- timerWakeCycle respects album selection
- Discard stale pre-renders on album change

Co-authored-by: Cursor <cursoragent@cursor.com>

src/immich_client.h

@@ -31,8 +31,10 @@ public:
     void begin(const String& baseUrl, const String& apiKey);
     std::vector<AlbumInfo> fetchAlbums();
     std::vector<String> fetchAlbumAssetIds(const String& albumId);
-    std::vector<String> fetchRandomAssetIds(int count = 50);
-    std::vector<RandomAsset> fetchRandomAssets(int count = 50);
+    std::vector<String> fetchRandomAssetIds(int count = 50,
+                                             const std::vector<String>& albumIds = {});
+    std::vector<RandomAsset> fetchRandomAssets(int count = 50,
+                                               const std::vector<String>& albumIds = {});
     std::vector<String> fetchFavoriteAssetIds();
     AssetInfo fetchAssetInfo(const String& assetId);
     bool downloadAsset(const String& assetId, ImageQuality quality,